ProSoft Technology 5201-MNET-101S - Manual (Page 71)

IEC-101 Slave ♦ ProLinx Communication Gateway Reference
IEC 60870-5-101 v3 Slave (Firmware version 3.xx) Protocol Manual
ProSoft Technology, Inc. Page 71 of 159
August 6, 2010
The relationships between the data types and the read and write data areas of
thegateway are displayed in the following diagram:
The Write Data Area is used to hold data for the 101S Monitored Point
databases, which is data that will be sent by the 101S Slave driver from the
gateway to the remote Master. The Read Data Area is used to hold data for the
101S Control Point databases, which is data that has been sent from the remote
Master to the 101S driver to be stored in the gateway. The read and write areas
can be placed anywhere in the gateway's database. Because the gateway
address of each point is defined individually, the data area for a specific data
type need not be contiguous in the gateway’s memory. However, most users find
it convenient to keep data of each type in contiguous address blocks.
Module error/status data can be passed to the Master using the M_ME_NB_1
database. In the database definition for the type, establish a point for each status
value to be monitored by the Master and set the gateway's database address for
the point in the definition.